iOS_触摸事件与手势识别

#import "ViewController.h"

@interface ViewController ()
@property (weak, nonatomic) IBOutlet UIView *myView;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    //设置myView控件支持用户交互
    self.myView.userInteractionEnabled = YES;
    //设置myView控件支持多点触碰
    self.myView.multipleTouchEnabled = YES;
    //二、pinch手势（放大、缩小）(捏合)
    UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pinch:)];
    [self.view addGestureRecognizer:pinch];
}

//实现手势处理器的方法，该方法应该声明一个形参
//当该方法被激发时，手势处理器会作为参数传给该方法的参数
-(void)pinch:(UIPinchGestureRecognizer *)sender
{
    if (sender.state == UIGestureRecognizerStateRecognized)
    {
        //1.使用仿射变换获取当前的状态
        CGAffineTransform transform = self.myView.transform;
        //2.按照变换系数对view进行变换
        transform = CGAffineTransformScale(transform, sender.scale, sender.scale);
        //3.按照新的仿射变换进行变换视图
        self.myView.transform = transform;
    }
}
@end

#import "ViewController.h"

@interface ViewController ()
@property (weak, nonatomic) IBOutlet UIView *myView;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    //设置myView控件支持用户交互
    self.myView.userInteractionEnabled = YES;
    //设置myView控件支持多点触碰
    self.myView.multipleTouchEnabled = YES;
    
    //三、Rotain手势（旋转）
    UIRotationGestureRecognizer *rotain = [[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(rotain:)];
    //给view控件添加手势处理器
    [self.view addGestureRecognizer:rotain];
}

-(void)rotain:(UIRotationGestureRecognizer *)sender
{
    if (sender.state == UIGestureRecognizerStateChanged)
    {
        //方式一：
        //使用放射变换进行旋转
//        self.myView.transform = CGAffineTransformMakeRotation(sender.rotation);
        
        //方式二：
        //1.使用仿射变换获取当前的状态
        CGAffineTransform transform = self.myView.transform;
        //2.按照变换系数对view进行变换
        transform = CGAffineTransformRotate(transform, sender.rotation);
        //3.按照新的仿射变换进行变换视图
        self.myView.transform = transform;
    }
    sender.rotation = 0;
    /*
     方式一与方式二的区别在于：
     在执行之后方式一不需要进行复位操作，方式二需要进行复位。以防影响下一次操作。
     注意：复位不是必须的，可以根据开发者的需要进行选择是否需要进行复位操作。
     */
}

@end

#import "ViewController.h"

@interface ViewController ()
@property (weak, nonatomic) IBOutlet UIView *myView;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    //设置myView控件支持用户交互
    self.myView.userInteractionEnabled = YES;
    //设置myView控件支持多点触碰
    self.myView.multipleTouchEnabled = YES;
  //六、swipe手势（轻扫）
    UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipe:)];
//    swipe.direction = UISwipeGestureRecognizerDirectionRight | UISwipeGestureRecognizerDirectionLeft;
    
    [self.view addGestureRecognizer:swipe];
}

-(void)swipe:(UISwipeGestureRecognizer *)sender
{
    if (sender.direction == UISwipeGestureRecognizerDirectionRight)
    {
        NSLog(@"swipe right");
    }
    else if (sender.direction == UISwipeGestureRecognizerDirectionLeft)
    {
        NSLog(@"swipe left");
    }
    else if (sender.direction == UISwipeGestureRecognizerDirectionUp)
    {
        NSLog(@"swipe up");
    }
    else if (sender.direction == UISwipeGestureRecognizerDirectionDown)
    {
        NSLog(@"swipe down");
    }
}
@end

#import "ViewController.h"

@interface ViewController ()
@property (weak, nonatomic) IBOutlet UIView *myView;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    //设置myView控件支持用户交互
    self.myView.userInteractionEnabled = YES;
    //设置myView控件支持多点触碰
    self.myView.multipleTouchEnabled = YES;
    //五、longPress手势（长按）
    UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPress:)];
    //指定该手势处理器只处理几个手指的触碰事件
    longPress.numberOfTouchesRequired = 1;
    //长按的持续时间（按住多久之后才算做是长按）
    longPress.minimumPressDuration = 0.5f;
    //为控件添加长按手势
    [self.myView addGestureRecognizer:longPress];
}
-(void)longPress:(UILongPressGestureRecognizer *)sender
{
    if (sender.state == UIGestureRecognizerStateChanged)
    {
        self.myView.backgroundColor = [UIColor yellowColor];
    }
    else if (sender.state == UIGestureRecognizerStateEnded)
    {
        self.myView.backgroundColor = [UIColor redColor];
    }
}
@end